Hello. First post here and thanks for having me. I have had a U.S. 37mm round for some time which was sold to me as an AP round, with the projectile painted black. Looking at it recently, I realized it was not an AP, but is a T27 HE shell, dated 1942. I do not see the T27 in the 1944 dated TM, which is the earliest I have found in my searches so far. Can someone tell me when, and in what, the T27 was used? Thank you.